Year | Value | 2023 | 73.5 | 2022 | 72.8 | 2021 | 70.3 | 2020 | 69.4 | 2019 | 61.9 | 2018 | 59.5 | 2017 | 57.2 | 2016 | 50.3 | 2015 | 42.7 | 2014 | 40.3 | 2013 | 37.5 | 2012 | 34.7 | 2011 | 32 | 2010 | 30 | 2009 | 21 | 2008 | 14 | 2007 | 8.28 | 2006 | 6.81 | 2005 | 6.07 | 2004 | 5.32 | 2003 | 4.32 | 2002 | 3.52 | 2001 | 2.69 | 2000 | 1.82 | 1999 | 1.16 | 1998 | 0.473 | 1997 | 0.241 |
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